* elf32-bfin.c (bfin_howto_table): Set src_mask to 0 for all relocs.

[deliverable/binutils-gdb.git] / gdb / ppcobsd-nat.c

diff --git a/gdb/ppcobsd-nat.c b/gdb/ppcobsd-nat.c
index 5f4348427acafdd99d0dce6f59e3164abb185a49..c0088c7460cb232429af2fd0304c6836367c4c7d 100644 (file)
--- a/gdb/ppcobsd-nat.c
+++ b/gdb/ppcobsd-nat.c
@@ -1,6 +1,6 @@
 /* Native-dependent code for OpenBSD/powerpc.
 
-   Copyright 2004 Free Software Foundation, Inc.
+   Copyright 2004, 2005 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -20,15 +20,22 @@
    Boston, MA 02111-1307, USA.  */
 
 #include "defs.h"
+#include "gdbcore.h"
 #include "inferior.h"
 #include "regcache.h"
 
 #include <stddef.h>
 #include <sys/types.h>
 #include <sys/ptrace.h>
+#include <sys/signal.h>
+#include <machine/frame.h>
+#include <machine/pcb.h>
 #include <machine/reg.h>
 
+#include "ppc-tdep.h"
 #include "ppcobsd-tdep.h"
+#include "inf-ptrace.h"
+#include "bsd-kvm.h"
 
 /* OpenBSD/powerpc doesn't have PT_GETFPREGS/PT_SETFPREGS like
    NetBSD/powerpc and FreeBSD/powerpc.  */
@@ -36,14 +43,14 @@
 /* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
    for all registers.  */
 
-void
-fetch_inferior_registers (int regnum)
+static void
+ppcobsd_fetch_registers (int regnum)
 {
   struct reg regs;
 
   if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
-             (PTRACE_ARG3_TYPE) &regs, 0) == -1)
-    perror_with_name ("Couldn't get registers");
+             (PTRACE_TYPE_ARG3) &regs, 0) == -1)
+    perror_with_name (_("Couldn't get registers"));
 
   ppcobsd_supply_gregset (&ppcobsd_gregset, current_regcache, -1,
                          &regs, sizeof regs);
@@ -52,21 +59,58 @@ fetch_inferior_registers (int regnum)
 /* Store register REGNUM back into the inferior.  If REGNUM is -1, do
    this for all registers.  */
 
-void
-store_inferior_registers (int regnum)
+static void
+ppcobsd_store_registers (int regnum)
 {
   struct reg regs;
 
   if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
-             (PTRACE_ARG3_TYPE) &regs, 0) == -1)
-    perror_with_name ("Couldn't get registers");
+             (PTRACE_TYPE_ARG3) &regs, 0) == -1)
+    perror_with_name (_("Couldn't get registers"));
 
   ppcobsd_collect_gregset (&ppcobsd_gregset, current_regcache,
                           regnum, &regs, sizeof regs);
 
   if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
-             (PTRACE_ARG3_TYPE) &regs, 0) == -1)
-    perror_with_name ("Couldn't write registers");
+             (PTRACE_TYPE_ARG3) &regs, 0) == -1)
+    perror_with_name (_("Couldn't write registers"));
+}
+\f
+
+static int
+ppcobsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
+{
+  struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (regcache));
+  struct switchframe sf;
+  struct callframe cf;
+  int i, regnum;
+
+  /* The following is true for OpenBSD 3.7:
+
+     The pcb contains %r1 (the stack pointer) at the point of the
+     context switch in cpu_switch().  At that point we have a stack
+     frame as described by `struct switchframe', and below that a call
+     frame as described by `struct callframe'.  From this information
+     we reconstruct the register state as it would look when we are in
+     cpu_switch().  */
+
+  /* The stack pointer shouldn't be zero.  */
+  if (pcb->pcb_sp == 0)
+    return 0;
+
+  read_memory (pcb->pcb_sp, (gdb_byte *)&sf, sizeof sf);
+  regcache_raw_supply (regcache, SP_REGNUM, &sf.sp);
+  regcache_raw_supply (regcache, tdep->ppc_cr_regnum, &sf.cr);
+  regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 2, &sf.fixreg2);
+  for (i = 0, regnum = tdep->ppc_gp0_regnum + 13; i < 19; i++, regnum++)
+    regcache_raw_supply (regcache, regnum, &sf.fixreg[i]);
+
+  read_memory (sf.sp, (gdb_byte *)&cf, sizeof cf);
+  regcache_raw_supply (regcache, PC_REGNUM, &cf.lr);
+  regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 30, &cf.r30);
+  regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 31, &cf.r31);
+
+  return 1;
 }
 \f
 
@@ -76,6 +120,14 @@ void _initialize_ppcobsd_nat (void);
 void
 _initialize_ppcobsd_nat (void)
 {
+  struct target_ops *t;
+
+  /* Add in local overrides.  */
+  t = inf_ptrace_target ();
+  t->to_fetch_registers = ppcobsd_fetch_registers;
+  t->to_store_registers = ppcobsd_store_registers;
+  add_target (t);
+
   /* General-purpose registers.  */
   ppcobsd_reg_offsets.r0_offset = offsetof (struct reg, gpr);
   ppcobsd_reg_offsets.pc_offset = offsetof (struct reg, pc);
@@ -94,4 +146,7 @@ _initialize_ppcobsd_nat (void)
   ppcobsd_reg_offsets.vr0_offset = offsetof (struct vreg, vreg);
   ppcobsd_reg_offsets.vscr_offset = offsetof (struct vreg, vscr);
   ppcobsd_reg_offsets.vrsave_offset = offsetof (struct vreg, vrsave);
+
+  /* Support debugging kernel virtual memory images.  */
+  bsd_kvm_add_target (ppcobsd_supply_pcb);
 }